斜交桥的冲刷计算探讨

斜交桥的桥墩附近流态和冲刷情况极为复杂,很难准确确定桥墩附近的冲刷深度。通过对南盘江大桥桥墩附近的冲刷计算分析,从而探讨斜交桥冲刷计算的方法。计算结果表明:桥轴线与水流的斜交角度和桥墩阻水面积对冲刷影响明显,按斜交面积计算的冲刷深度比较合理,按投影面积计算的结果偏大。

Discussion on scouring calculation of diagonal crossing bridge

Flow pattern and scouring is very complicated around the piers of diagonal crossing bridge,rendering great difficulty for determination of scouring depth there.Calculation and analysis was conducted for the zone nearby the bridge piers of Nanpanjiang bridge,so as to probe into the scouring calculation method for diagonal crossing bridge.The results of calculation demonstrate that the angle of bridge axis crossing water flow and the water-blocking area of bridge pier render significant influence on scouring;scouring depth calculated with diagonal crossing area is relatively rational and is bigger with projection area.